New Blue Zac Williams faces a nervy wait for a decision from the MRO after a dangerous bump on St Kilda's Hunter Clark within the first 10 seconds of the Blues' AAMI Community Series loss to the Saints on Thursday night.

After Clark released a kick into the Saints' forward 50, Williams caught him high which resulted in a downfield free kick.

Clark was a bit initially dazed from the hit but ultimately played out the game, which could play in Williams' favour of avoiding a suspension.

If the hit is considered low-impact by MRO Michael Christian, Williams will only be looking at a fine with no suspension.

But if the hit is deemed medium to high impact, a stint on the sidelines could await for the star recruit.

Speaking on Fox Footy post-game, Garry Lyon said the hit probably deserves a week on the sidelines.

“Conversations around concussion right now, that is the last thing you want to be doing now,” Lyon said.

“If he got a week, that wouldn’t worry me one bit … You leave the ground and make head-high contact, that’s a dangerous act.

“It’s jumping off the ground and making contact to the head, so it probably warrants a week.

“Take a hard stand, make a point early in the piece.”

Also speaking on Fox Footy post-game, Jonathan Brown added that he feels the decision is a 50-50 one and will depend on how the AFL sees it, especially considering the aftermath of the hit.

“It’s dumb, very dangerous,” Brown said.

“Anytime you leave the ground, you open yourself up to the MRO and big suspensions.

“There’s enough in the aftermath of that incident that they could consider a week there. They wouldn’t be happy with that stumbling effect, the look of the game.

“I reckon it’s 50-50. They could see an opportunity to go, ‘righto, we’re going to warn all the competition’.”

Despite being in the spotlight for the hit, Williams had an impressive first hit out with the Blues, racking up 17 disposals and also hitting the scoreboard, kicking 2 goals.